What is the narrator point of view in the novel, Bluebeard?

Bluebeard: A Novel is written entirely as an autobiography of fictional character Rabo Karabekian. There is even a dedication at the beginning of the book that is not from Vonnegut, but from the fictional Karabekian to another character in the book, Circe Berman.

The book is written in the first-person singular point of view and offers insights into the mind of Karabekian. It also reveals a subjective account of his life, rather than hearing the tale from an objective source.